Illuminating device for hydrometers and the like



Aug. 22, 1933. G. R. CARLSON 1,924,024

ILLUMINATING DEVICE FOR HYDROMETERS AND THE LIKE Filed Nov. 26, 1952 2Sheets-Sheet 1 I nventor 5055a 22. 6 a r2507,

Aug. 22, 1933. G. R. CARLSON 1,924,024

ILLUMINATING DEVICE FOR HYDROMETERS' AND THE LIKE Filed Nov. 26, 1952 2Sheets-Sheet 2 Invenlor By @Mmim Patented Aug. 22, 1933 ILLUMINATINGDEVICE sort HYDROM ETERS 'ANDTHE LIKE I I ,Gosta Richard Carlson,Raritan, N. J.

Application November 26, .1932] Serial N;"644,527 V 3'Olaims. (Cl. 240-6.4)1

This invention relates to an illuminating de-.

vice for hydrometers and the like, the general object of the inventionbeing to provide a holder for thehydrometer containing a window and anelectric bulb for illuminating apart of the hydrometerwhich is visiblethrough the window so that the hydrometer or other testing instrumentcan be readily read. 7

This invention also consists in certainother features of constructionand in the combination and arrangement of the several parts to behereinafter fully described, illustrated in the accom panying drawingsand specifically pointed out in the appended claims. 7

In describing the invention in detail, reference will be had to theaccompanying drawings wherein like 1 characters denote like 'orcorresponding parts throughout the several views, and in which: 4

' Figure 1 is a view of a hydrometer showing the device applied thereto.Y

Fig. 2 is a vertical sectional viewthrough the body of the device whichcarries the battery and bulb. 2

Fig. 3 is a top plan view of the device shown in Fig. 2.

and cap removed.

Fig. 5 is a view of the cap.

Fig. '6 is a view of the contact member.

Fig. 7 is a 'view of the disk of insulating material. I

Fig. 8 is a sectional view through the window member.

In these drawings, the numeral indicates the" body of the devicewhich-is formed at its outer edge with a vertically arranged chamber 2terminating short of the top of the body and having its lower endextending below the lower edge of the body and this end isexteriorlythreaded to receive the closing cap 3. This chamber is adapted toreceive a battery 4 and a substantially L-shaped contact member 5 whichhas its long arm fastened to a part of the body 1 by a screw or the likepassing through the opening 6 in 5 said long arm and insulatedtherefrom.

The short arm has an intermediate olfset downwardly extending part whichis arranged adjacent the top of the chamber and is adapted to engage theupper post of the battery as shown in Fig. 2. A screw 7 passes throughthe cap and has an enlargedhead 8 whereby the screw can be turned to aposition where its free end will engage the battery and force thebattery against the contact member 5 and thus close the circuit to thebulb 9' the base of which is Fig. 4 is a bottom plan view with thebattery threaded in a socket member 10 which passes transversely throughthe body 1 with its reduced end located in the chamber 2 and engagingthe lower end of the long arm of the contactmember 5. v i Thatsideof thebody opposite the side which 5 carries the chamber 2 has a concaverecess therein in which'thefbulb 9 is located, as shown in Fig. 2. Theupper and lower projecting portions formed by this recesscarry thesubstantially semi-circular clamps 11 each of which has an 5 innerlining 12 of felt or the like. These clamps are adapted to engageportions of a hydrometer such as shown at A in Fig. 1 and after theclamps are so engaged'with the hydrometer a housing B of the shape shownin Figs. 1 and 8 is placed over the-hydrometer into engagement withportions of the body 1 and the clainps 11.

'Thismember B is formed with a window 13 and said member is ofsubstantially semicircular shape with the flanges 14 extending from theside edges thereof for'fitting over portions of the body 1, theseflanges covering the concave recess in the body so that the rays oflight from the bulb are confined and will illuminate that portion of ahydrometer over which the device v is-placed so that the reading of thehydrometer can readily bemade through the Window 13, as shown in Fig. 1.g s g I Thus I have provided means for facilitating thev reading of thescale on a hydrometer or 5- similar device. A disk 15 insulates thecontact member from the top'wall of the chamber.

It is thought from the foregoing description that'the advantages andnovel features of theinvention will be readily apparent.

It is to be understood that changes may be made in the construction andin the combination and arrangement of the several parts provided thatsuch changes fall-within the scope of the appended claims. 7 T1 .Havingthus described my'invention, what -I claim as new is:- v

, 1. A device for facilitating the reading of a hydrometer or the likecomprising a'body having a recess therein opening out through one edgeof,

of-the body, one at the top and the' other at the bottom, for engagingthe hydrometer and anelongated housing having an elongated openingthere- 1 in, having its ends fitting over the clamps with the walls ofthe opening engaging the body, with the ends of the housing being open,said housing covering part of the hydrometer and having a 9 I windowtherein for exposing a portion of the hydrometer.

2. A device of the class described comprising a body having a recesstherein opening out through one edge of the body and through portions ofthe sides thereof a lamp in said recess, split ring clamps attached tosaid edge'of the body, one above the recess and the other below therecess, a housing having an opening in one side thereof with its endsfitting over the clamps, flanges ex tending outwardly from the wallsofthe opening in the housing for covering the sides of the recess, saidhousing having in a part of the housing. a

3. A device of the class described comprising a body having arecess'therein opening out through one edgeof the body and throughportions of the sides thereof, a lamp in said recess, split ring.

clamps attached to said edge of the body, one

in a part of the housing,

its ends open and a window 7 said chamber an L-shaped member in thechamberhav'ing one limb engaging a contact of the lamp and its otherlimb adapted to engage a part of the battery, a cap for closing the openend of the chamber and a screw carried by the cap for forcing thebattery against the second limb of the L'-s'hap'ed member. V I

GOSTA RICHARD CABLSON.

said body having a charn-

